Bump gatsby-plugin-mdx from 1.0.52 to 1.0.53

Bumps [gatsby-plugin-mdx](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-mdx) from 1.0.52 to 1.0.53.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-mdx/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-mdx@1.0.53/packages/gatsby-plugin-mdx)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

yarn.lock

@@ -7628,9 +7628,9 @@ gatsby-plugin-catch-links@^2.1.2:
     escape-string-regexp "^1.0.5"
 
 gatsby-plugin-mdx@^1.0.22:
-  version "1.0.52"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-mdx/-/gatsby-plugin-mdx-1.0.52.tgz#d7f00dfde08005f1a60184130a7cbc5f8e2a9221"
-  integrity sha512-jz2vQ9EyrlxD6gOK1kwGWKUcwXWe3n5QuQpM2P/Yfkjy2PpWivknferTo3iVxk3vj3JD6BRCyg2/vDiRiVsvBA==
+  version "1.0.53"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-mdx/-/gatsby-plugin-mdx-1.0.53.tgz#a81a273b3489c6734992c7b3ae27195e6369793e"
+  integrity sha512-F/y9q1xud83ANEKijWnR5YpmDYuW++KSO3xtSWo3pYeCh8QwdCGpaJseMuZlGpdpeNKc9ceB+eWvBWkewVpcMw==
   dependencies:
     "@babel/core" "^7.6.4"
     "@babel/generator" "^7.6.4"